<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <script>
      const str = "hello";
      const arr = ["css", "js", "vs"];
      const obj = { a: 1, b: 2 };
      for (let v of str) console.log(v);
      for (let v of arr) console.log(v);
      // for (let v of obj) console.log(v);
    </script>
  </body>
</html>
